Combination pressure-gage and deflation-signal.



J. H. BROWN.

COMBINATION PRESSURE GAGE AND DEELATION SIGNAL.

APPLICATION FILED JUNE 9,1913.

Patented 0ct.6,1914.

/N VEN TOR.

A TTORNE Y.

en/@Mm vseveral. ligures. and as described JOHN H. BROVN, 0F MIDVALE, UTAH.

COMBINATON PRESSUREGAGE AND DEFLATIUNSIGNAL.

To ZZ colto-mit muy concern Be it known that I, JOHN l-l. Buown, a citizen of the United States, residing at Midvale, in the county of Salt Lake and State of Utah, have invented certain new ,and useful Improvements in Combination Pressure-Gages and DetlationSignals.' ol which the following is a speiication.

My invention relates to devices by which the pressure of air within the inner tube of a vehicle tire may be determined. and `has for its object toprovide a gage hy ,which the pressure of air in the vehicle tire may be ascertained at sight and Without opening the air tube, and alsovby ineans of the saine gage a signal will be displayed when the pressure in said tire falls below a'prede- -terniined point. These objects l accomplish with .the devia illustrated in the accoinpanying drawing in which snnilar letters ot reference indicate like partstln'oughout the ications forming and pointed out in the appended claims.

forni of constructing myv gage, Figure l is an elevationol' the gage with the cap therei for and the portions olf the wheel and tire.

=tire and the compi shown in section. Fig. 2 is a. longitudinal section throughl the device online fc :u ot

Fig. 3, slightly enlarged and .showing` al' section'through the telly of the wheel in which thedevice is mounted. Fig. 3 is a. fragmentary View of a vehicle wheel with the device mounted. thereon. Fig. #l is a; plan view orA the clamps and plate by which the device is held in place, showing one jaw of the clamp turned on its pivot in position. Fig. 5 is a side elevation of the saine. Inyehicle tires of the pneuniatic type itl is desirable to know the pressure ot air in each tire and to ascertain that tact pressure Agages are applied to an opening1 in 'the inner tube, usually over the air VTalve which de- 'ice opens said valve and forms an openv connection with the inne;l tube and 'the interior cavity ot the gage and hy means ot a graduated plunger the pressure is determined. Also at ti mcs there will he a puncture of the ssed air therein will Lescapewithout the knowledge. of the driver. As a result of theA escape of the air. the tire is frequently injured hetore 'the fact'of `a puncture is known,andfdevices have been patented and used which will sound a in the specia. 'part of this application -within, said case Specification of Letters Patent.

Application tiled June 9, i913.

Patented Get. t3. sei-iai no. 772,713.

inner side of the tire to contact with parts of the device and open a `valve and allow air to escape through a whistle. Such deA vices have failed in practical use on account or' air escapingl through the whistle valve. 'The purpose of iny invention, as prer-` vlously stated, is to combine in one device a gage and deflation signal which will indicate the pressure of air in the ingl anvelectric contactwill signal when the pressure is so low in thc tire. that to continue to run the vehicle will cause injury to the tire. The amount ot' air low which it is not sate to run may be predetermined and the set. accordingly. In the drawings the device is shown as cured to the telly l ol the wheel hy boringr a holo radially through the said telly and riin ol' the wheel and clamping the device thereon by nicans of a. plate l which is lastened on the inner side ot the folly. Said plate has clamps pivotcd thereto adjacent In the drawings showing the prcterredi to an opening 8 which is provided in said plate 1. Each ot said clainps Q has a scinicircular upwardly extended flange if thereon whichr held in gripping contact with the case 5 by means of iain nut G which engages said flanges it when it is screwed down on the threaded portion 7 ot said case 5. sleeve nut S is also screwed on' the sai(w threaded portion T by ineans of which. the insulating case 9 is held in place. A thiinhle l0 is telescoped within said insulating' case 9 and held therein by a contact screw 1G. A gage plugv 'l2 is fastened on one end ot a. spiral sprintf i3 and slid-ably operated within said case o. The other end oin said 'springt 13 is fastened to. and said spring operated plunger rod 1l has one end fastened 10 and the other end is held in contact with said gage plug` l2 in order that when said thinible 1G is moved longitudinally within said insulating case Sl said spring` will he drawn outward and said ga nlug' 1Q inovcd longitudin ally and to the saine extentas said thiinble lO. longitudinally extended slot or openingr l5 is cut in the side o't said insulating case 9 which einln'aces said Contact screw lG'that is inserted into the side oit said thinible lO and is inoved in said slot l5 whenever saidhthiznble is moved. Said contact screw i6 is at all times in electrical connectire and by forni# in the tire be' to the end ot' said thinible case '0 with a. portion thereof ,enteringsaid slet 'l5 in order that said Contact screw 16 may engage therewith when contiguous. Said' member 1T is electrically connected with a signal (not shown) by means of a wire' 1S, which is inserted through said felly A and carried on one of the spokes B` of the `wheel to a contact strip 1.9 which 'is .fastened bctifeen tivo ofsaid spokes B. Said plate l is electrically connected with a battery that is carried on the machine but not shown, by a wire 2() which is inserted into the hub C ofthe wheel and attached to one of the metal parts thereof. s

lhe assembling and operation of my device is as follows1-rl`hegage plug-'12 having- :fgrzuluated scale on the side thereof which is properly numbered to indicatef the pres-l sure oi the air is fastened to one endof `a spiral spring ll.v The spiral spring is then fastened at its other end within the said .case and the insulatingcase 9 and sleeve nut S which have been fastened together by vthe pin are secured-on said casey by screv-:ing the said sleeve on the threaded portion 'of the case.'l The thimble 10 is telescopedl over the enel of said case 5 and the parts of the device thusassembled are inser'tedwithin a radially disposed hole in the `telly of the Wheel withI said sleeve nut 8 bearing against the plate 1v which is suitably fastened tol the inner periphery of the felly. 'lhe said parts are held in place by the jam nut G being also screwed on said case 5 engaging said clamps 4 and drawing said clamps and sleeve nut against said plate 1. The inner tube D which is preferably strengthened where it contacts with vsaid vthimble l0 by a reinforcement patch 23,

when inllated will move said thimble longitudinally within the insulating case 9, and' -the spiral spring 13 will be extended, by the plunger rod 14 bearing against the gage plug 2. Should there be a puncture of said inner tube D its deflation therefrom Awould remove the pressure from the end of the thiinble l0, and thereupon the spring 13mm-'Ould move the thimble. longitudinally 'until the said contact screwv 116 will enga ge With said Contact member 17. An electric circuit 'is thereby formed over the wires 18 andQO when the travel of' the vehicle or revolutions of the 'wheels causes the contact strip 19 to pass over a spring-held contact post which is fasn tened to the frame work ot the vehicle.

Having thus described my invcntionldesire to secure by Letters Patent and claim.;

` 1. ln a device of the class described the `combination of a casing; a thimble slidable fasten said casing to the telly of a Wheel said means including a sleeve nut; an insulating case carriedon 'said thimble and Asecured to said sleeve'nut and provided with a longitudinal slotl therein; a contact member carried on said insulating case; a ciontact point movable with said thimble; and an electric circuit adapted to becompleted when said Contact point and said Contact f member,V are touching.

2. In a device of the class described the combination of a tubular case provided with external threads on a portion thereof; a sleeve nut screwed thereon';-.a plate; clamping members pivoted thereto; a jam nut screwed on said case and engaging said clamp members; a thimble slidable over the frcc end of said case; a plunger secured Vto said thimble VVand operable in said lcase; a spring having one end `fastened to said plunger. and the other` end secured to said case; an insulating case carried on said thimble and secured to saidsleevey nut'having a slot therein; a contact-point operable in said slot; and a contact memberlcarrid on said insulating'ease to complete an electric circuit when said contact point and contact member are brought together.

3.' Ina device of the class described the combination of a tubular case having 'external' threads thereon; a fastening plate; clamp members pivoted `the-reto; outwardly extended flanges on said clamp members; a

asv

jam nut on-said .case engaging said flanges;

carried o n said thimble and secured to said` sleevenut; a contact point on said thimble;

anda contact member cari'ed on said insu' -lating sleeve adapted to complete anelectric circuit when brought in touch with said A contact point.

'4. In a deviceof the class ldescribedthe combination of atubularcase having eX- ternal threads'cut on a portion, thereof; a

,fastening plate/clainp mem-bers pivoted thereto.; outwardly extended flanges thereon; a jam nut on said case adapted to engage said flanges; a sleeve nut screwed on said case; a .thimble slidable over the free.

end. portion of said case; a plunger operable f in said ease having a graduated scale n one end portion; a rod connecting said plunger and said thimble; a spring 'carriedcn said' rod-With one end secured to' said plunger and the other end `fastened to said case; an insulating sleeve on said tls-able and secured to said sleeve nut and providedv with a longitudinal 'slot therein; a Contact point onsaid thimble operable in said longitu` point is brought incontact therewith as and for y.the purposes described.

5. In -a device of the class described the combination of a detachable casing; a plunger gage operabletherein; a thimble slidable over. the free end of said casing; a spring connecting said plunger gage and said thimble; a. contact point movable with said thimble; an insulatedcasing Within "which Said thimble telescopes; a contact member secured on saidinsulated casing; an electric circuit completed when said contact point and said contact member are contiguous.

` 6. In a device of the class described the combination of a detachable casing; a plunger operable therein; a thimble slidable over the free end of said casing; and yieldingly connected'with said plunger gage; a spring connecting said plunger gage and said thimble; acontact polnt movable with said thimble;

a contact member adjacent with said contact point; members adapted to form an electric circuit when said gage is moved to a predetermined point by the deliation oi the inner tube of a Vehicle tire.

7. In a device of the class described the combination of a detachable casing; a plunger gage operable therein; a thinible telescoped over the free end of said casing and movable by the infiation or deiation of the inner tube of a vehicle tire; a spring connectlng said plunger gage and said casingg'a rod on which said spring is carried and connecting said plunger gage and said thiinble; a contact point movable with said thimble; a contact member secured to said elly and members adapted to form an electric circuit when said gage is movedto a predetermined point by the deiat-ion of said inner tube.

In testimony whereof I have afxed my signature in presence of two Witnesses.

y JUHN BROVN. Witnesses: y Y

WV. W. BARTON, SAM RANEY. 

